html,body{
    margin: 0;
    padding: 0;
    height: 100%;
    background-color: pink;
}
#d1{
    background-image: url('./1.jpg');
    height: 100px;
}
#d2{
    background-image: url('./2.jpg');
    height: 100px;
}
#d3{
    background-image: url('./3.jpeg');
    height: 100px;
}